The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 02, 2014
Filed:
May. 03, 2011
Yoshitaka Sasaki, Milpitas, CA (US);
Hiroyuki Ito, Milpitas, CA (US);
Shigeki Tanemura, Milpitas, CA (US);
Kazuki Sato, Milpitas, CA (US);
Atsushi Iijima, Hong Kong, CN;
Yoshitaka Sasaki, Milpitas, CA (US);
Hiroyuki Ito, Milpitas, CA (US);
Shigeki Tanemura, Milpitas, CA (US);
Kazuki Sato, Milpitas, CA (US);
Atsushi Iijima, Hong Kong, CN;
Headway Technologies, Inc., Milpitas, CA (US);
Sae Magntics (H.K.) Ltd., Hong Kong, CN;
Abstract
A thin-film magnetic head includes a main magnetic pole layer, write shield layer, gap layer, and thin-film coils, which are laminated on a substrate. A return magnetic pole layer is spaced from the medium-opposing surface on the side opposite to the write shield layer with the main magnetic pole layer intervening therebetween. A connecting magnetic layer is formed using a magnetic material to connect the return magnetic pole layer to the write shield layer on the side closer to the medium-opposing surface than is the thin-film coil. The thin-film coil is wound as a flat spiral around the write shield layer. A part of the thin-film coil wound as the flat spiral is disposed only at a position distanced from the substrate than is the main magnetic pole layer.